[Frontend] Use std::optional in ASTUnit.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 10 Dec 2022 07:12:19 +0000 (23:12 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 10 Dec 2022 07:12:19 +0000 (23:12 -0800)
commite90e8487dce37ace5cfabb5b27cb0dc0ba5b566f
tree153773d983592e519d73adc795507ea6d1950f2c
parent538401da1d16e4ca84423f6da3526c72b2fdb493
[Frontend] Use std::optional in ASTUnit.cpp (NFC)

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
clang/lib/Frontend/ASTUnit.cpp